This is a Quote from www.mazdausa.com

 

Thanks for the information. As i suspected. This particular intake is a mazdaspeed 3inch diameter pipe. Although its not particularly relevant.
Visited local Mazda dealership today and was advised to take car in for a diagnostic test, I was also quoted 111 GBPounds for a replacement MAF sensor. The parts guy was unable to glean any relevant part nos form the MAF itself, instead, he searched it on the database. There is a 4-5 day wait.
So, taking all into consideration the obvious thing to do is take it to said garage.
Such decisions are not taken lightly!

 

After 9 hours investigating and re-installing the stock and original air intake the fault code suggests that apparently a new PCM is required. A PCM is is the main board/computer/brain for the car i'm told. A PCM costs in excess of 1300GBPounds with 1.5hrs labour to install.
This has come as a serious blow as you can imagine. I am struggling to come to terms with this diagnosis as it is purely an electronic component without moving parts. If water or mechanical damage had come at it, this i could understand, but for it to break down whilst doing, after all, what its designed to, how could this occur?
Has anyone heard of or experienced this before?
I am contemplating starting a new post for this issue. Let me know what you think.
With a dealer bill nearing 2000GBPounds before me i want to make sure its the right course of action.
Thanks.
P.S. No room for smileys on this one!

 

Yo Swan330 - my best friend... I know we've been in contact today and still struggling to come to terms with this diagnosis but I'm gonna elaborate further on this...

I absolutely share your view that the premise of a PCM replacement (I believe to be the Powertrain Control Module) is unbelievable! From my point of view, the PCM works because the car works. In an electronic point of view, has the PCM become unstable due to over/under voltage, faulty sensors, etc. If the PCM has completely packed up, surely the engine wouldn't run at all! I would be furious if the PCM was replaced and the problem continued and that's what worries me to a degree... Don't get me wrong, who else to go to but a Mazda dealer which is what you exactly did. A Diagnosis after 9 hours is completely out of order (9 Hours?!?!?!)... I don't think their Diagnostic equipment needs 8.5 hours to warm up!!! Make damn sure that the "faulty" PCM is put into your hands - It is YOURS!!! Can anyone actually tell us exactly where the PCM is??? I'd like to note down all it's details... As Swan330 asked, has anyone heard of this before? Also, is it likely that the PCM can have an "Impending" failure? Thanks in advance to all who have helped so far and will hopefully help some more!
Toonzer

 

here u might want to check the clutch if it is a stick and flywheel

 

any update on this? im from scotland and my mazda 6 is doing something similar and the mazda main dealer has had it 2 weeks and is no further forward finding the cure. only had the car 8 weeks and 2 of them spent in the garage so far im getting alittle disheartened at the thought will they ever find/fix the fault, main thing i suppose is my car is under warranty. they aint to smart just got told today they tried new spark plugs in it, whew i thought that woulda been one of the first things they tried. will follow up how i get on but ive a feeling this may take a while longer yet.